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What Is Aluminium Extrusion Process?
09 Aug, 2023

What Is Aluminium Extrusion Process?

Aluminum extrusion is a versatile manufacturing process widely used across industries. This article aims to learn more about the process of aluminum extrusion.

Understanding Aluminium Extrusion

Aluminum extrusion has a long history that dates back to the nineteenth century. It rose to prominence in the early twentieth century and has since grown into a crucial industrial process. Extrusion is a manufacturing process that involves shaping a material by pushing it through a die. A billet (a cylindrical piece of aluminum) is heated and driven through a shaped aperture in the die to generate a continuous profile in the case of aluminum extrusion.

LED Aluminum Profile

LED Aluminum Profile

The Aluminium Extrusion Process

Here are 5 steps as the following:

Preparing The Billet

Before the aluminum extrusion process begins, careful consideration is given to selecting the appropriate billet size and alloy composition. The billet, which is often constructed of recycled aluminum, is scrutinized for impurities or faults that might damage the quality of the final product. Once the billet has been accepted, it is heated to make it pliable for extrusion.

Heating The Billet

Heating the billet is a critical step in the aluminum extrusion process. The billet is placed in a furnace and heated to a specific temperature, usually between 800 to 950 degrees Fahrenheit (427 to 510 degrees Celsius). This increased temperature causes the aluminum to acquire a proper amount of flexibility, making it simpler to push through the die and mold into the correct profile during extrusion.

Extrusion Process

When the billet achieves the proper temperature, the real extrusion process begins. The heated billet is placed into a container called a "container ram," which is situated behind the extrusion press. A hydraulic press applies tremendous pressure to the billet, driving it through the die.

Industrial Aluminum Profile

Industrial Aluminum Profile

Cooling And Quenching

After the extrusion is complete, the newly formed aluminum profile emerges hot from the die. To ensure optimal mechanical properties and dimensional stability, the extruded profiles are rapidly cooled and quenched. This regulated chilling technique "freezes" the microstructure of aluminum, preventing undesired grain patterns from forming and increasing the material's strength and hardness.

Cutting And Storing The Extruded Profiles

Once the profiles have been extruded and cooled, they are cut to the desired length using saws or other cutting methods. The cut profiles are then inspected for any surface defects or imperfections. Additional finishing procedures, like brushing or anodizing, may be used to improve the look of the profiles and protect them from corrosion if necessary.

Advantages Of Aluminium Extrusion

Here are the major advantages of aluminum extrusion:

Lightweight And Strong

One of the most significant advantages of aluminum extrusion is its exceptional strength-to-weight ratio. Aluminium is a lightweight metal, about one-third the weight of steel. Despite its low density, aluminum has excellent mechanical properties, making it a popular choice for applications needing weight reduction, such as those in the aerospace and automotive industries.

T-Slot Aluminium Profile

T-Slot Aluminium Profile

Versatility And Design Flexibility

Aluminum extrusions provide designers with unprecedented flexibility in creating unique profiles and shapes to satisfy specific project needs.  The extrusion process allows for the creation of intricate designs with varying cross-sections, enabling architects and engineers to bring their most innovative ideas to life.

Environmentally Friendly

As a fully recyclable material, aluminum aligns with sustainable practices and environmental considerations. Recycling aluminum requires only about 5% of the energy needed to produce primary aluminum from bauxite ore. This considerably minimizes greenhouse gas emissions and conserves natural resources, making aluminum extrusion a more environmentally friendly material than alternative options.


While certain extrusion profiles may have upfront tooling costs, the long-term benefits of aluminum extrusion frequently surpass these initial expenses. The great efficiency of the extrusion process, as well as the abundance of aluminum as a raw material, contribute to its low cost. Furthermore, the lightweight nature of aluminum can save money on shipping and installation when compared to heavier materials.


Aluminum extrusion is a highly valuable process that offers numerous benefits across various industries. Its lightweight, strength, recyclability, and design flexibility make it an attractive choice for architects, engineers, and designers. If you are looking for aluminum extrusion, XIANGZHEN is your good choice! Please feel free to contact us at for further information about our top-quality Aluminum extrusion!

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